Cisco ASR 1000 Series Software Configuration Guide

Table 40: Cisco ASR 1001 and ASR 1000 Series Chassis Software Images
With Technology
Package License Part
Number
In CombinationTo order Universal
Software Image Part
Number
For the equivalent feature
set on ASR 1000 Series
(ASR 1002-F/ASR
1002/ASR 1002-X/ASR
1004/ ASR 1006/ASR 1013)
SLASR1-AES+SASR1001UK9Advanced Enterprise
Services K9 (AESK9)
Overview of the Cisco DSP SPA
The Cisco DSP SPA has been introduced on Cisco ASR 1000 Series Aggregation Services Routers to provide
voice transcoding and transrating functionalities. The DSP SPA is a half-height SPA. The Product ID of DSP
SPA is SPA-DSP. The SPA-DSP is a service SPA and does not have external physical interfaces on the front
panel. The SPA-DSP has 21 Digital Signal Processors (DSPs) which perform the encoding and decoding of
voice streams. The SPA-DSP works in conjunction with the SBC application to provide the voice transcoding
and transrating functionalities. The CUBE (ENT) can also use the SPA-DSP for transcoding and transrating.
The SPA-DSP in the transcoder case, provides functionality to translate one type of media stream using a
specific codec type to another type of media stream that uses a different type of codec technologies. This not
only includes translation between differing codecs, but also functionality such as the translation between
different packetization settings (transrating), and the ability to perform DTMF interworking.
The SBC on the Cisco ASR1000 Series Router, externally known as Cisco Unified Border Element, Service
Provider - CUBE (SP) can be configured as a Unified SBC or as a Distributed SBC. When configured as a
distributed SBC, the SPA-DSP can be used externally as a centralized resource for other SBCs.
High-Level System Details
Based on the type of operational management, the SPA-DSP functions can be divided into two modules: Data
Plane and Control Plane.
The data plane module is responsible for processing and sending the data. The SPA-DSP does not have any
interfaces towards the network. The DSPs on the SPA process the voice packets that they receive from the
QFP side and send the transcoded voice packets back to the QFP.
After initial set up a boot image is uploaded to the SPA-DSP. The full SPA-DSP image is then uploaded and
the SPA-DSP is controlled through the DSP control packets.
The SPA-DSP does not have a CPU or a hard disk.Note
Understanding Codecs and Maximum Channels Supported
Each SPA-DSP comprises of seven SP2603 DSP chips having a total of 21 DSP cores (3 DSP cores per
SP2603). Based on the complexity of codec (low, medium, high), the density or maximum number of channels
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17 399
Overview of the Cisco DSP SPA for the ASR 1000 Series Aggregation Services Routers
Overview of the Cisco DSP SPA

Cisco ASR 1000 Series Specifications

General

Brand	Cisco
Model	ASR 1000 Series
Category	Network Router
Language	English